The South Florida Business Journal reports the employees have been doing contract work with Bechtel Power Corp. to expand two nuclear units at the plant. One of the units is completed.

The projects have employed about 5,000 workers over the past several years. According to FPL spokesman Peter Robbins, the remaining work is on schedule and due to be completed in spring of 2013.

All work by Bechtel is expected to be completed by May 26, according to the WARN. The 277 employees are to lose their jobs between Jan. 6 and May 26.

Among those to be laid off: 77 field engineers, 49 superintendents, 44 design engineers and 22 welding field engineers. The employees are not represented by a union. The layoffs are expected to be permanent.

The South Florida Business Journal contributed material for this report.